Many who post videos do not actually write on the subject they proclaim their expertise within... Many times I see, in my opinion, people who do not know how to do proper research and who also do not know how to write, or write well enough... So the process of doing basic research gets ignored and instead people take a video of themselves speaking the a subject, but NOT offering anything but opinions... Giving an opinion on an essay that you wrote for example is different from giving an opinion on someone else essay or video because when you write out something you UNDERSTAND it on a more deeper level... Giving an opinion on someone else essay or video to many means a simple viewing of a video with little to no understanding of the real content... With the exception of those who already have a background within that subject.